221123343 has 32 divisors (see below), whose sum is σ = 342328320. Its totient is φ = 124358400.

The previous prime is 221123339. The next prime is 221123363. The reversal of 221123343 is 343321122.

221123343 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 221123343 - 2² = 221123339 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221123303) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 434173 + ... + 434681.

It is an arithmetic number, because the mean of its divisors is an integer number (10697760).

Almost surely, 2^221123343 is an apocalyptic number.

221123343 is a deficient number, since it is larger than the sum of its proper divisors (121204977).

221123343 is a wasteful number, since it uses less digits than its factorization.

221123343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807.

The product of its digits is 864, while the sum is 21.

The square root of 221123343 is about 14870.2166426720. The cubic root of 221123343 is about 604.7068160313.

Adding to 221123343 its reverse (343321122), we get a palindrome (564444465).

The spelling of 221123343 in words is "two hundred twenty-one million, one hundred twenty-three thousand, three hundred forty-three".